Proper environment improves the storage of primed pansy seed
1991
Carpenter, W.J. | Boucher, J.F.
Primed and nonprimed 'Majestic Giant Yellow' pansy (Viola xwittrockiana Gams.) seed had similar total germination percentages, but priming reduced the number of days to 50% of final germination by 25% and the days between 10% and 90% germination by 21%. Reducing the moisture content of nonprimed seed from 10.5% to 5.8% caused no change in total germination, but primed seed germination decreased at moisture contents below 10%. Total germination percentages of primed and nonprimed seeds declined as storage temperatures were reduced from 5 to -20C. Storing primed seed at 5C and 11% relative humidity (RH) for 16 weeks reduced seed moisture contents to 8.4% and total germination by 28%. Primed seeds, after 5C storage at 75% or 95% RH for 16 weeks, contained 23.7% and 28.3% moisture, and germination had declined 31% and 48%, respectively. Primed seed stored 16 weeks at 5C and 52% RH had 12.5% seed moisture content and germination had declined by 2%. Moisture contents of primed pansy seeds must remain between 12% and 20% during 5C storage or total germination will decline and the benefits of more rapid and uniform germination are lost.
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